VLA imaging of the XMM-LSS/VIDEO deep field

DOI

Modern radio telescopes are routinely reaching depths where normal star-forming galaxies are the dominant observed population. Realizing the potential of radio as a tracer of star formation and black hole activity over cosmic time involves achieving such depths over representative volumes, with radio forming part of a larger multiwavelength campaign. In pursuit of this, we used the Karl G. Jansky Very Large Array (VLA) to image ~5deg^2^ of the VIDEO/XMM-LSS extragalactic deep field at 1-2GHz. We achieve a median depth of 16uJy/beam with an angular resolution of 4.5arcsec. Comparisons with existing radio observations of XMM-LSS showcase the improved survey speed of the upgraded VLA: we cover 2.5 times the area and increase the depth by ~20 per cent in 40 per cent of the time. Direction-dependent calibration and wide-field imaging were required to suppress the error patterns from off-axis sources of even modest brightness. We derive a catalogue containing 5762 sources from the final mosaic. Sub-band imaging provides in-band spectral indices for 3458 (60 per cent) sources, with the average spectrum becoming flatter than the canonical synchrotron slope below 1mJy. Positional and flux density accuracy of the observations, and the differential source counts are in excellent agreement with those of existing measurements. A public release of the images and catalogue accompanies this article.

Cone search capability for table J/MNRAS/496/3469/table1 (Radio source catalogue)

Identifier
DOI http://doi.org/10.26093/cds/vizier.74963469
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/496/3469
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/3469
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/3469
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/496/3469
Provenance
Creator Heywood I.; Hale C.L.; Jarvis M.J.; Makhathini S.; Peters J.A.,Sebokolodi M.L.L.; Smirnov O.M.
Publisher CDS
Publication Year 2023
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Natural Sciences; Observational Astronomy; Physics